This project consists of the idea of stacking and sectioning. A grid was created in order to divide functions. The dimensions were adapted to the human body in order to serve them. It consisted of two systems: the box and the stairs differentiated by the materials and the functions. Both systems create a central element that does not touch the wall. In the updated iteration, the steel was extended to make the circulation more flexible and larger. It connects the three lower levels creating a large circulation space.